When Indian Prime Minister Narendra Modi and Chinese President Xi Jinping met at the Shanghai Cooperation Organisation summit in Bishkek, Kyrgyzstan, the encounter was short and carefully choreographed while the message was warm. Modi had earlier said that stable and predictable ties between the two largest nations on Earth matter for a multipolar Asia and world. The larger moment will come on September 12 and 13, when Xi is expected to visit New Delhi for the first time in seven years. He is...